Hjerpe (elbow) will begin a rehab assignment at the Cardinals' Florida Complex League affiliate Friday.
It will be Hjerpe's first game action since he underwent Tommy John surgery last April. The left-hander will knock off some rust in the FCL before eventually moving up either to Double-A Springfield or Triple-A Memphis. Hjerpe is on the Cardinals' 40-man roster and could push to debut at some point in the second half. The 2022 first-round pick collected a 3.27 ERA, 1.13 WHIP and 76:28 K:BB in 52.1 innings at Springfield in 2024.